Linux Open Port 80 (HTTP Web Server Port)

by Vivek Gite · 2 comments

Q. How do I open port 80 (Apache Web Server) under Red Hat / CentOS / Fedora Linux?

A. The default configuration file for iptables based firewall under RHEL / CentOS / Fedora Linux is /etc/sysconfig/iptables. Open this file using a text editor such as vi:

Linux Open Port 80 (http)

# vi /etc/sysconfig/iptables
Append rule as follows:
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
Save and close the file. Restart iptables:
# /etc/init.d/iptables restart

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{ 2 comments… read them below or add one }

1 gabriel July 18, 2009

I tried this and restarted the ipchains with service iptables restart

but it will still not work.

any ideas?

Reply

2 james stewart July 20, 2009

Thanks for this. Being used to debian/ubuntu I’d forgotten where to go when setting up a CentOS box.

@gabriel – you might want to try moving the rule further up in the file. I put it as the last rule but that didn’t work. Moving it further up (in particular before “-A RH-Firewall-1-INPUT -j REJECT –reject-with icmp-host-prohibited”) seemed to do the trick.

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